How do you use two cameras on one screen or two different screens with seperate cameras

To use multiple videos (dual cameras) you will need to purchase a video multiplexer. The PV750 has only one video input, which means if you want multiple video inputs you will have to combine the two or more cameras into one video signal and input that into the PV750. We have experimented with a Full Color Quad that can combine four video inputs into one, and can switch between any one single video, a combination of video 1 & 2, or video 3 & 4, or all four video at once. There are plenty to choose from depending on which features you are looking for.